电测与仪表2017，Vol.54Issue(18)：72-78,7.
基于改进HHT的电压闪变检测
Voltage flicker parameters detection based on modified HHT
摘要
Abstract
During the detection of voltage flicker parameters using HHT algorithm, the intrinsic mode functions ( IMF) generated by empirical mode decomposition ( EMD) are not ideal and the parameter detection errors are grea-ter.This paper presents a modified HHT detection method of voltage flicker.Firstly, by adding the four point interpo-lation subdivision algorithm in the EMD "sifting" steps, a group of control points are split and the fitting curve is formed by cubic-spline interpolation, and then, a set of IMF components are decomposed.Finally, the Hilbert trans-form is used to obtain the voltage flicker parameters.As to single component flicker signal containing noise and multi-component flicker signal containing noise or no noise, the simulation experiment was carried out by using HHT method and modified HHT method respectively.The research results show that the modified HHT algorithm has better anti-noise ability, which can suppress the modal aliasing and improve the accuracy of flicker signal parameters detection.关键词
电压闪变/改进HHT/固有模态分量/四点插值细分算法Key words
voltage flicker/modified HHT/intrinsic mode function/four interpolation subdivision algorithm分类
信息技术与安全科学引用本文复制引用
倪良华,肖李俊,吕干云,历馨..基于改进HHT的电压闪变检测[J].电测与仪表,2017,54(18):72-78,7.基金项目
国家自然科学基金资助项目(51577086) （51577086）
国家自然科学基金青年基金项目(51507077) （51507077）
南京工程学院科研基金重点项目(ZKJ201304 （）
CKJA201406) （）
